Oil filter



Feb. 29, 1944; J. H. LONG OIL FILTER Filed March 2, 1942 fr JamesHLqng',

Patented Feb. 29, 1944 UNITED STATES PATENT OFFICE OIL FILTER JamesHartzell Long, Clay Center, Kans.

Application March 2, 1942, Serial No. 433,040

4 Claims. (Cl. .2N- 131) My invention relates to oil filters of the typeemployed in the removal of impurities from oil used in lubricatingautomotive and other internal combustion engines equipped with pumps forforcing the oil through the associated filters.

The present invention is an improvement over rnv U. S. Patent No.2,210,213, issued Aug. 6, 1940. Objects of the present invention are toprovide an oil filter possessing the advantages of my patented filterand also additional advantages such as arranging and connecting most ofthe inerior parts in such manner that they may be removed from the outercasing of the filter as a single unit; to prevent wastage of free oilfrom the outer casingduring removal therefrom of the interior parts withthe filtering material after the latter has become permeated withimpurities; to utilize more space in a given size filter so that thesame may be charged with a larger quantity of filtering material andthus reduce the necessity for frequent recharging; to provide means forinitially lifting the unit in the casing, so that it can be readilygrasped and removed by hand; to reduce to a minimum the number of sealedopenings in the filter casing through which leakage of oil might occur;and to facilitate cleansing of the inside of the casing by providing thebottom thereof with a sump which can be removed with sludge depositedtherein by the oil. p

Other advantages will hereinafter appear and in order that the inventionmay be fully understood, reference will now be had to the accompanyingdrawing, in which:

Fig. 1 is a vertical central section of my oil lter.y

Fig. 2 is a fragmentary cross section on line 2-2 of Fig. 1. s

Fig. 3 is a detail of a conical spring.

In carrying out the invention I provide an outer casing 2 having a xedbottom 4, an oil inlet 5 in its upper portion, and a removable cover 3provided with a downtumed marginal flange 8 for retaining a gasket I0 onthe upper margin of the casing 2.

The bottom 4 of the casing 2 has a centrally disposed upwardlyprojecting socket I2 of segmental spherical form to provide a modifiedballand-socket joint in conjunction with the correspondingly shapedenlarged lower end of an outlet member I4 extending upward into the'casing through a central aperture I6v in the opening 28.

at 20 for connection with an outlet pipe (not shown).

The modified ball-and-socket joint enables the i outlet member I4 to beaxially alined with and threaded in the lower end of a vertical, tubularconnector 22 provided at its upper portion with an oi1 inlet 23 and acap nut 24, which latter, in addition to being threaded upon the tubularconnector is further secured thereon by a transverse pin 26, so thatwhen grasped and rotated to apply or remove the tubular connector 22from the outlet member I4 said cap nut 24 will not become unscrewed fromthe tubular connector. The cap nut 24 extends down through a -centralopening 28 in the casing cover 6 and its enlarged upper end overlaps agasket 29 resting upon the cover and adapted to seal the After theoutlet member I4 has been alined with the tubular connector 22 it may bebrazed or otherwise permanently secured in the socket I2.

A perforated tube 30, spaced from but arranged concentrically with thetubular connector 22, rests at its lower end upon a plate 32, a gasket34 being interposed between said lower end and the plate to provide anoil-tight joint.

The plate 32 rests upon a conical spring 36 and has a central aperture38 through which the upper portion of a nut 40 extends. 'I'he nut 40 isthreaded on the lower end of the tubular connector 22 and has anenlarged lower end for vsupporting the spring 36.

The plate 32 provides a removable bottom for a perforated cylinder 42which rests in a removable sump 44 located on the casing bottom 4 tocatch sludge and other impurities deposited therein by the oil. Anupwardly extending Imarginal flange 45 on the sump serves to center theperforated cylinder 42 within the casing 2. TheA sump has a centrallydisposed upwardly extending tubular portion 46 with a central aperture4l through which the outlet member I4 projects. A conical spring 48 isinterposed between the socket I2 and the tubular portion 46 forinitially lifting the sump 44 from the bottom 4 when the tubularconnector 22 and nut 40 are removed from the casing as will hereinafterappear. After thus initially lifting the sump 44, it can be readilyremoved from the casing 2, as any suction tending to hold it against thecasing bottom 4 will be interrupted.

The upper end of the perforated cylinderr42 is provided with a fixed lid50 which is preferably spot-welded or otherwise secured to the underside of the cover 6. so that the lid, the pen forated cylinder 42 andthe cover may be removed together from the casing 2. A peripheral flange52 depending from the lid 50, sur-A rounds the perforated cylinder 42and coacts with the flange 6 of cover 6 in holding the gasket I upon theupper edge of the casing 2. The central portion of the lid 50 isprovided with a depending tubular extension 54 having a central aperture55 through which the tubular connector 22 projects. The tubularextension 54 removably fits into the flaring upper end of the be packedin from the plate 32 to the lid 50.

thereby utilizing almost the entire inner part of the casing 2 for thefiltering material.

In practice, oil to be filtered enters through the inlet 5 and fills thecasing 2 to a level with the inlet 23 in the tubular connector 22through which the oil descends and escapes through the outlet duct I8after passing through the perforated cylinder 42, the filtering materialA, and the perforated tube 30. In the course of time the filteringmaterial becomes so permeated with impurities deposited by the oil thatit no longer performs its function in an eicient manner and should thenbe replaced with fresh filtering material. The foregoing can be readilyaccomplished by first rotating nut 24 until the tubular connector 22 isunscrewed from the outlet member I4. During the foregoing operation nut40 partially lifts spring 36, plate 32, tube 30, cylinder 42 with thefiltering material, lid 50 and cover 6 as one unit and thereby breaksthe seal between the casing 2 and the gasket I0. thus overcoming anysuction tending to hold the lid and the cover upon the casing 2. Afterthus breaking the seal and partially raising the complete unit thelatter can be easily removedfrom the casing by pulling upward on the lid6 orvthe nut 24. When the lid 50 and cover B are lifted as stated, therewill be no overflow and wastage of free oil as the level of the latterwas prevented by the filtering material and flange 52 from rising abovethe lower edge of the latter when the lid 50 was in closed position.After the unit has been removed from casing 2 nut 40 is unscrewed fromthe tubular connector 22, which latter, together with plate 32 and theperforated tube 30 are then removed from the perforated cylinder 42. Astube 30 is removed it takes therewith the old filtering material. Thetube 30 and the cylinder 42 are then cleansed, after which the former isreplaced in the latter which is then repacked with fresh filteringmaterial. The remainder of the unit is then assembled ready forplacement in the casing 2. Before replacement of the unit. however, thesump 44, which was initially lifted from the container bottom 4 byspring 48 when relieved of pressure from nut 40, is manually removedfrom the casing 2, cleansed, and replaced.

From the foregoing description, taken in connection with the drawing, itis apparent that I have provided an efficient filter well adapted forthe purpose intended and while I have shown a preferred form of thefilter I reserve all rights to such other forms and modificationsthereof as properly fall within the scope of the invention as claimed.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. In an oil filter, a casing having an inlet and an outlet and providedwith a closed bottom, a filtering medium in said casing disposed betweenthe inlet and the outlet, a sump resting upon said bottom and adapted tobe removed from the casing, said sump having a centrally disposedupwardly extending tubular portion, means removable from the casing andadapted to hold` the sump on the bottom of the casing, and spring meansinterposed between the bottom of the casing and said tubular portion toraise the sump when said removable means is removed from the casing.

2. In an oil filter, a casing having an oil inlet and provided with abottom having a centrally disposed inwardly projecting socket ofsegmental spherical form, an oil outlet member extending inwardlythrough a central aperture in the socket and provided with an enlargedlower end of segmental spherical form fitting snugly within said socket,a filtering medium in the casing interposed between the oil inlet andthe oil outlet member, a removable cover for the casing, a tubularconnector threaded upon the oil outlet member and extending through acentral aperture in the cover, and means on the upper end of the tubularconnector overlapping the cover and adapted when rotated in onedirection tov unscrew said tubular connector from the oil outlet member.

3. In an oil filter, a casing having an inlet and an outlet, a removablefiltering medium in said casing disposed between the inlet and theoutlet, a removable sump in the lower part of the casing, meansremovable from the|casing and adapted to normally hold the sump in thelower part of the casing, and resilient means interposed between thesump and the bottom of the casing for initially raising the sump in thecasing when said removable means is taken from the casing.

4. In a casing having an inlet and a closed bottom, a perforatedcylinder open at its bottom and removably disposed in the casing,filtering material in the perforated cylinder, a plate removablyarranged inside the open bottom of the perforated cylinder, a lidclosing the upper end of the perforated cylinder and provided with acentral downwardly projecting extension, a perforated tube resting uponthe plate and removably engaging the lid and the central extension,spring means arranged beneath the plate to press the same upwardly andthereby normally hold the upper end of the perforated tube in assemblywith the lid, an adjustable support'for said spring means, a tubularconnector having an inlet near its upper end and upon which the supportis adjustably mounted, means closing the upper end of the tubularconnector and overlapping the lid, and a stationary outlet memberextending through the bottom of the casing and upon which the lower endof the tubular connector is threaded.

JAMES HARTZELL LONG.

